top of page
< Back
Daviteq ULC Ultrasonic Liquid Level Sensor

Daviteq ULC Ultrasonic Liquid Level Sensor


Sản phẩm thay thế mới

SKU được thay thế

Satellite IoT

Phòng trưng bày

1. Giới thiệu


Daviteq ULC Ultrasonic Level Sensor is to measure the level of liquid surface of water, oil... This level sensor utilises the ultrasonic technology to measure the surface of liquid, the principle is to measure the time of flight of the ultrasound pulse in the air environment. The ultrasound pulse will be ejected from ultrasonic transducer, go thru the air and reaching the surface of liquid, then reflected back to the ultrasonic transducer, the measuring circuit will measure the time of flight of the Pulse then calculate the distance from transducer to the surface.

The ULC can be integrated into the wireless transmitter from Daviteq, such as Sub-GHz WS433, LoRaWAN WSLRW, and Sigfox WSSFC, to build the complete Wireless Tilt Sensors. The ULC is also powered by the batteries in the wireless transmitter.


Sensing technology: Ultrasonic sensor

Measurement range: 250∼5500mm

Resolution: ±5.0mm

Accuracy: ±10mm + S*0.3% (with S is the measured value)

Sensor sampling rate: configurable from 10s up to 3600s

Alarm setting: setting the alarm threshold for calculated value

2. Nguyên tắc hoạt động

ULC sensing module emits an ultrasonic pulse from the transmit transducer to the object, and the ultrasonic wave will reflect back to the receiving transducer. The micro-controller will measure the time difference between the sound wave from the transmitting transducer and the receiving reflected sound wave. From that, it calculates the distance by the following formula:

D = ( Time x V ) / 2


D: Distance from the sensor to object surface

Time: the time difference between the wave from the transmitting transducer until receiving the reflected wave

V: velocity of ultrasonic wave in the environment.

The effective detection range of the ULC sensor:

  • The tested object is the white cylindrical tube, the material is PVC, height is 100cm, diameter is 75mm:

  • The tested object is the carton board, placed in parallel with the sensor surface, carton board size is 60x50cm:

The smart firmware allows the sensor to filter the wrong echo signal from a rough surface in the trashbin so that it can deliver the accurate average distance or level value.

In addition, it also eliminates the wrong signal when the sensor is moving with the lid during opening (in a short time).

Note: The filter functions can be adjusted by changing the parameter Num_of_Samples. The higher value, the more effective filtering, the higher the energy consumption, and the shorter battery life.

3. Hiệu chuẩn

The Daviteq ULC ultrasonic level sensor measures the distance by taking the air speed of ultrasound in the ambient air. Therefore calibration is not required.

However, in most liquid level applications, customers need to get the level value instead of distance. To do so, the coefficient A & B value is calculated from the height of the tank as per the below instructions.

  • DB: Dead band 0∼280mm (This is a short range in front of the ultrasonic sensor can not measure distances)

  • H: Maximum measuring distance (Span)

  • D: Distance

How to determine H value?

Method 1:

Method 2:

Note: a, b of sensor must be as default when use Method 2. (Default value a= 1, b= 0)

How to determine the new coefficients A and B?

The calibration formula is L = a x D + b. Calibration at 2 points: L = 0 when D = H and L = H - DB when D = DB

The result is A = -1 and B = H and the level formula is L = H - D

4. Ghi chú ứng dụng

Widget Didn’t Load
Check your internet and refresh this page.
If that doesn’t work, contact us.

5. Installation Notes

  • Make sure the installation environment does not emit gases that harm the transducer or the device housing (usually made from Polycarbonate);

  • Make sure the measured distance must be within the detection range of the sensor;

  • Do not place the transducer upward to the sky for outdoor application as the rain drops can cause malfunctioning;

  • Make sure there is no impact on the transducer surface; it will cause the transducer to get damaged;

  • Do not install the sensor in the closed compartment with solvent vapor or steam; it will cause the wrong measurement.

6. Troubleshooting

Please follow below instructions for troubleshooting

7. Maintenance

  • There are no moving parts or consumed parts in the ULC ultrasonic level sensor. Therefore there is no need to do maintenance.

  • However, depending on the installation environment, the transducer must be checked and cleaned periodically for accurate measurement.

8. Cấu hình mặc định